Select the formula for bivalent nitric oxide 1) N2O 2) NO2 3) N2O5 4) 4NO

Oxygen in compounds (except for compounds with fluorine) always has valence (II), that is, it creates two chemical bonds. Nitrogen with a valency of two must also create two bonds. This occurs in the compound NO.

In the N2O compound, the valence of nitrogen (I), because two chemical bonds of oxygen are spent on bonds with two nitrogen atoms, one for each. In the compound NO2, the valence of nitrogen (IV), in the compound N2O5, the valence of nitrogen (V).